The Journal · The Brantford Club

Semi-Formal Attire: the Suit, the Dress, and the Hour on the Card

Semi-formal attire is one step below black tie. For men it means a dark suit, a dress shirt, a tie, and leather shoes; for women a cocktail-length dress, a dressy suit, or a long skirt with a dressy top. It sits between cocktail attire and black tie optional, and most North American invitations use it to mean cocktail.

A dinner card that says semi-formal names a middle without naming either edge, which is why the phrase gets searched more often than black tie, a code that at least describes a garment. The Brantford Club has hosted the dinners those cards are printed for in its private rooms at 98 George Street since 1898, and it publishes a written code for its dining room, so it reads the phrase from both sides of the door.

What is semi-formal attire?

Semi-formal attire is the dress standard for an occasion that wants more than office clothes and less than evening dress. Merriam-Webster defines the adjective as “being or suitable for an occasion of moderate formality,” and the Emily Post Institute’s attire guide places it above what you would wear to an office and a little below what you would wear to a formal event. In garments, that is a dark suit with a tie for a man and a dress that ends near the knee for a woman, with a dressy suit or a long skirt and a dressy top as equal answers. It asks for a tie where cocktail attire does not insist on one, and it stops short of the dinner jacket.

The code also has a daytime reading and an evening reading, and the convention is printed in the etiquette guides. The Emily Post Institute puts the line at six in the evening and advises a guest to err toward formality after it. By convention, a daytime occasion admits a lighter suit in grey or muted blue and, for women, a dress in colour or print with a lower shoe. After six the palette darkens: navy or charcoal, a darker tie, a darker dress or a heavier fabric. The garments keep their category; the shade changes.

What Men Wear, What Women Wear, and What Stays Home

Semi-Formal Beside Cocktail, Black Tie Optional, and Business Formal

Four codes crowd the space between a work suit and a tuxedo, and the table sorts them by the garment that decides each one.

The middle pair causes the most emails. Most North American hosts and guests read semi-formal and cocktail as one code; the practical difference is the tie, which semi-formal expects and cocktail forgives. The Journal has a companion piece on what cocktail attire forgives for the reception side of that line.

Where the Card Says Semi-Formal

Five kinds of card carry semi-formal more than any other. A wedding uses it when the couple wants suits in the photographs without asking for a tuxedo. The dinner the evening before drops a notch, to a jacket without the tie. A company dinner uses it to raise the room one notch above the office. A graduation banquet uses it because the graduates own one suit or one dress. A gala at a club uses it when the panelling and the set table do most of the dressing. A holiday party uses it when the host wants the evening reading without asking for black tie.

A club that publishes a dress code is a fair place to read the phrase against. The Brantford Club’s policies page gives the dining room rule in one line: “Dining Room dress code is ‘Smart Casual.’ Collarless t-shirts, shorts, ripped jeans and hats are not permitted.” That is the floor of the house on an ordinary evening. When a host prints semi-formal on the card for the Large Dining Room upstairs, which seats sixteen, or the Main Floor Dining Room, which takes up to sixty, every guest who follows the card clears the house rule by two steps. The Journal’s guide to what smart casual asks at the door covers the floor itself; the piece on the club dress code covers what the pub asks.

Overdressed, Underdressed, and the Jacket Left in the Car

The errors with semi-formal attire run in both directions, and the overdressed ones are rarer and cheaper. The commonest underdressing is the blazer-and-chinos reading, worn by a man who took “semi” as licence to drop the suit. Next is the missing tie, which takes a correct suit down a full code at a table where every other man wore one. Denim under a good jacket follows. On the women’s side the repeated errors are the floor-length gown at a knee-length dinner, which reads as black tie, and the cotton sundress at an evening event, which reads as afternoon. The last is the jacket left in the car in July. Semi-formal is a jacketed code in every season; carry it in and hang it on the chair.

Semi-Formal in 1906, and at a Country Tea in 1922

The word is an early twentieth-century one. Merriam-Webster gives the first known use of “semiformal,” in the sense it still defines, as 1906. The word is younger than the Club, whose door at 98 George Street opened on New Year’s Eve, 1898. Emily Post used it in her 1922 Etiquette, in the chapter on a man’s clothes, advising that for a semi-formal occasion in the country, such as a tea, the blue coat with white flannel trousers “is perennially good.” The daytime reading is as old as the phrase, then: a lighter, unmatched outfit for the afternoon, the dark suit held back for the evening. The Oxford English Dictionary’s entry sits behind a subscription and is not quoted here.

Five questions, one dinner card

Sources: Merriam-Webster, “semiformal”; the Emily Post Institute’s attire guide (read September 2026); Emily Post, Etiquette (1922); the Oxford English Dictionary (subscription); the Club’s policies page, quoted verbatim, read September 2026.